PT-2026-48523

CVE-2026-49413 - FreeBSD LPE via Linuxulator AT SECURE Logic Bug A setuid exec ordering bug in the Linuxulator emits AT SECURE=0 in auxv, turning LD PRELOAD into euid=0 privilege escalation. https://t.co/waPg0ft2sf...

FreeBSD Security Advisory - FreeBSD-SA-26:30.linux

FreeBSD Security Advisory - The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the PSUGID process flag. During execve2, this flag is not yet set at the point where the auxiliary vector is constructed, so ATSECURE was incorrectly set to zero for set-user-ID and...

FreeBSD -- Flaw in Linuxulator execution of setugid binaries

Problem Description: The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the PSUGID process flag. During execve2, this flag is not yet set at the point where the auxiliary vector is constructed, so ATSECURE was incorrectly set to zero for set-user-ID and...

FreeBSD-SA-26:30.linux

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:30.linux Security Advisory The FreeBSD Project Topic: Flaw in Linuxulator execution of setugid binaries Category: core Module: linux Announced: 2026-06-09...